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新一轮干线天然气管线建设将具有输送距离长,采用更高工作压力和大管径输送的特点。当前国际上新一轮巨型天然气长输管道、单管输气量将达到450亿~500亿m3/a的水平。干线一般采用X80钢级。一个具有代表性的项目是正在建设的俄罗斯巴甫年科沃———乌恰天然气管道。管线长度1100km,采用1420mm管径和K65(类似于X80)钢级,输送压力11.8MPa,单管设计输气量约500亿m3/a,计划于2012年三季度进行系统调试。
A new round of trunk gas pipeline construction will have a long transport distance, the use of higher working pressure and large diameter transport characteristics. At present, a new round of giant natural gas long-distance pipelines in the world will reach a level of 45 billion to 50 billion m3 / a in single-tube gas transmission. Trunk generally use X80 steel grade. A representative project is the ongoing construction of the Russian Babu Nakovo - Wucha natural gas pipeline. The pipeline length is 1,100km. It adopts 1420mm diameter and K65 (similar to X80) steel grade with delivery pressure of 11.8MPa. The single-pipe designed gas transmission volume is about 50 billion m3 / a. It is planned to conduct system commissioning in the third quarter of 2012.